Efficient Removal of [UO₂]²⁺, Cs⁺, and Sr²⁺ Ions by Radiation-Resistant Gallium Thioantimonates

Abstract

Unconventional ion exchangers can achieve efficient removal of [UO], Cs, and Sr ions from complex aqueous solutions and are of great interest for environmental remediation. We report two new gallium thioantimonates, [MeNH][GaSbS]·HO (FJSM-GAS-1) and [EtNH][GaSbS]·HO (FJSM-GAS-2), which present excellent ion exchange properties for [UO], Cs, and Sr ions. They exhibit high ion exchange capacities for [UO], Cs, and Sr ions ( q = 196 mg/g, q = 164 mg/g, and q = 80 mg/g for FJSM-GAS-1, q = 144 mg/g for FJSM-GAS-2) and short equilibrium times for [UO] ion exchange (5 min for FJSM-GAS-1 and 15 min for FJSM-GAS-2, respectively). Both compounds display active ion exchange with [UO] in the pH range of 2.9-10.5. Moreover, the sulfide compounds could maintain high distribution coefficients K even in the presence of excess Na, Ca, and HCO. The distribution coefficient K of 6.06 × 10 mL/g exhibited by FJSM-GAS-1 is the highest among the reported U adsorbents. The [UO]-laden products can be recycled by conveniently eluting the uranium with a low-cost method. These advantages combined with facile synthesis, as well as β and γ radiation resistance, make FJSM-GAS-1 and FJSM-GAS-2 promising for selective separations in nuclear waste remediation.

Highly Selective Recovery of Lanthanides by Using a Layered Vanadate with Acid and Radiation Resistance

“…[21] [Me 2 NH 2 ] + as charge compensating cations are located at the interspaces of layers. Thel ayered structure,e xchangeability of interlayered [Me 2 NH 2 ] + cations, [11,20,22] excellent pH stability,a nd easy preparation provide the prerequisites of 1 for the adsorption of Ln ions.Eu 3+ and Sm 3+ ions adsorption experiments were carried out, respectively,and the corresponding Ln 3+ -adsorption products were denoted as 1-Eu and 1-Sm, respectively. EDS confirms that Eu 3+ and Sm 3+ ions have entered the structures of material (Supporting Information, Figures S2 and S3), and elemental distribution studies show that Eu 3+ and Sm 3+ ions were uniformly distributed throughout the samples (Supporting Information, Figure S4a).…”

Remarkable damage in talc caused by electron beam irradiation with a dose of up to 1000 kGy: lattice shrinkage in the Z- and Y-axis and corresponding intrinsic microstructural transformation process speculation

“…Nevertheless, it is also accompanied by much radioactive or toxic matter generation, which is extremely dangerous and radioactive, and can migrate to end up in the environment. [1][2][3][4][5] Thus, the most important issue is how to efficiently hinder such movement, lessening pollution. In reality, the major matter in the environment is clay as soil.…”

Novel One-Pot Solvothermal Synthesis of High-Performance Copper Hexacyanoferrate for Cs+ Removal from Wastewater

“…137 Cs is one of the most dangerous isotopes. Its long half-life, high energy β/c emission, and high solubility could make its way into the human body, leading to an increased incidence of cancer, leukemia, and genetic diseases [5][6][7][8][9][10]. For example, the Chernobyl accident in 1986 and the Fukushima accident in 2011 led to the accidental release of large amounts of 137 Cs [9,10].…”